Pickering emulsion polymerization: Preparation of polystyrene/nano-SiO2 composite microspheres with core-shell structure

Zhang, K.; Wu, Wei; Meng, Hong; Guo, Kai; Chen, J.-F.

doi:10.1016/j.powtec.2008.08.022

Cited by 145 publications

(63 citation statements)

References 29 publications

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“…The microspheres are between 0.5~2.0 µm in diameter and the surfaces of them are rough. These observations suggest that the Pickering emulsion polymerization using AIBN as the initiator mainly obeys the monomer droplet nucleation mechanism [33,34]. Figure 6 shows the suggested formation mechanism of composite microspheres I.…”

Section: Mechanism Analysis Of Ps/sio 2 Composite Microspheres Preparmentioning

confidence: 85%

Polystyrene/nano-SiO2 composite microspheres fabricated by Pickering emulsion polymerization: Preparation, mechanisms and thermal properties

Zhang¹,

Fan²,

Tian³

et al. 2012

Express Polym. Lett.

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We report the preparation, mechanisms and thermal properties of core-shell structured polymer/inorganic nanoparticle composite microspheres prepared by Pickering emulsion polymerization. Stable Pickering emulsion was firstly fabricated by using surface-modified nano-SiO2 particles as stabilizer. And then, two kinds of polystyrene/nano-SiO2 (PS/SiO2) composite microspheres with different sizes and morphologies were synthesized using hydrophobic azobisisobutyronitrile (AIBN) and hydrophilic ammonium persulfate (APS) as initiator, respectively. The possible mechanisms of Pickering emulsion polymerization initiated by different initiators were proposed according to the results of transmission electron microscope (TEM) and scanning electron microscope (SEM). The chemical structure and molecular weight of the composite microspheres were characterized by Fourier transform infrared spectroscopy (FTIR), X-ray diffractometer (XRD) and gel permeation chromatography coupled with a multi-angle laser light scattering photometer (GPC-MALLS). Thermogravimetric analysis (TGA) and differential scanning calorimeter (DSC) were used to comparatively analyze the thermal properties of nanocomposites and corresponding pure polymer. The results indicated that the decomposition temperature and glass transition temperature (Tg) of nanocomposites were elevated to a certain degree due to the existence of nano-SiO2

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Section: Mechanism Analysis Of Ps/sio 2 Composite Microspheres Preparmentioning

confidence: 85%

Polystyrene/nano-SiO2 composite microspheres fabricated by Pickering emulsion polymerization: Preparation, mechanisms and thermal properties

Zhang¹,

Fan²,

Tian³

et al. 2012

Express Polym. Lett.

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“…Bon and coworkers [85] also performed Pickering miniemulsion polymerizations of styrene using spherical silica nanoparticles of approximately 25 nm in diameter (Ludox TM-40), in which the packing arrangements of the silica nanoparticles on the surface were investigated and modeled with the aid of Monte Carlo simulations. Zhang and coworkers used organically modified silica nanoparticles to carry out a Pickering miniemulsion polymerization of styrene [107]. The co-use of sodium dodecyl sulfate (SDS) and 2-(methacryloyl) ethyltrimethylammonium chloride (MTC) as auxiliary monomer was also reported in the Pickering miniemulsion polymerization of styrene stabilized by silica nanoparticles [108].…”

Section: Polymerization Of Emulsion Droplets Armored With Inorganic Nmentioning

confidence: 99%

Physical Methods for the Preparation of Hybrid Nanocomposite Polymer Latex Particles

Teixeira

Bon

2010

Hybrid Latex Particles

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In this chapter, we will highlight conceptual physical approaches towards the fabrication of nanocomposite polymer latexes in which each individual latex particle contains one or more "hard" nanoparticles, such as clays, silicates, titanates, or other metal(oxides). By "physical approaches" we mean that the "hard" nanoparticles are added as pre-existing entities, and are not synthesized in situ as part of the nanocomposite polymer latex fabrication process. We will narrow our discussion to focus on physical methods that rely on the assembly of nanoparticles onto the latex particles after the latex particles have been formed, or its reciprocal analogue, the adhesion of polymer onto an inorganic nanoparticle. First, will discuss the phenomenon of heterocoagulation and its various driving forces, such as electrostatic interactions, the hydrophobic effect, and secondary molecular interactions. We will then address methods that involve assembly of nanoparticles onto or around the more liquid precursors (i.e., swollen/growing latex particles or monomer droplets). We will focus on the phenomenon of Pickering stabilization. We will then discuss features of particle interaction with soft interfaces, and see how the adhesion of particles onto emulsion droplets can be applied in suspension, miniemulsion, and emulsion polymerization. Finally, we will very briefly mention some interesting methods that make use of interface-driven templating for making well-defined assembled clusters and supracolloidal structures.

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“…In addition, Pickering emulsions have also been used as a versatile synthetic platform to prepare composite materials using different polymerization reactions [17][18][19][20]. In this way the macroscopic shape of the products can be controlled by adjusting the dispersed droplets in the Pickering emulsions.…”

Section: Particle-stabilized Emulsion (Pickering Emulsion): a New Synmentioning

confidence: 99%

Molecular imprinting in particle-stabilized emulsions: enlarging template size from small molecules to proteins and cells

Ye¹,

Zhou²,

Shen³

2015

Molecular Imprinting

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Molecular imprinting of small organic compounds is now a standard procedure for preparation of tailor-designed affinity materials. Molecularly imprinted polymers (MIPs) have outstanding stability and can be prepared in a large quantity, therefore are useful replacements for biological receptors for a number of applications including product purification, analytical separation, chemical sensing and controlled delivery and biomineralization. Although preparation of MIPs, in particular using the non-covalent imprinting strategy, has become a routine practice in many research laboratories, new synthetic methods continued to be invented, which contribute to new MIPs with unprecedented functional performances. As the size of the template increases from small organic compounds to biomacromolecules to large virus particles and cells, the traditional methods of imprinting often fail to give useful MIP products. Another important aspect is the shift from organic solvents to water for MIPs designed for treatment or analysis of biological samples. The demand on water-compatibility and recognition of larger entities for MIPs call for new and efficient synthetic methods. This mini review will summarize the recent progress of molecular imprinting using particle-stabilized emulsion as a general synthetic platform to furnish the new MIPs with the desired functions.

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Pickering emulsion polymerization: Preparation of polystyrene/nano-SiO2 composite microspheres with core-shell structure

Cited by 145 publications

References 29 publications

Polystyrene/nano-SiO2 composite microspheres fabricated by Pickering emulsion polymerization: Preparation, mechanisms and thermal properties

Polystyrene/nano-SiO2 composite microspheres fabricated by Pickering emulsion polymerization: Preparation, mechanisms and thermal properties

Physical Methods for the Preparation of Hybrid Nanocomposite Polymer Latex Particles

Molecular imprinting in particle-stabilized emulsions: enlarging template size from small molecules to proteins and cells

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